Chlor-alkali wastewater treating agent and preparation method thereof

A wastewater treatment agent, chlor-alkali technology, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of organic matter degradation in water, high COD in water, increase in water salinity, etc. To achieve the effect of low cost, good treatment effect and easy operation

Inactive Publication Date: 2015-11-18
宁波保税区维迪克环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the simple acid-base neutralization method is often used in the treatment of alkaline wastewater, which not only consumes a large amount of acid solution, but also increases the salinity of the water body, which brings difficulties to the subsequent treatment; on the other hand, simply adjusting the acid-base cannot make the The organic matter in the water body is degraded, so the COD of the water body is still high, and other methods must be used for combined treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In the embodiment of the present invention, the chlor-alkali wastewater treatment agent is composed of the following raw materials in parts by weight:

[0030] 30 parts of sodium silicate

[0031] 60 parts limestone

[0032] 20 parts of triethoxysilyl propyl glyceryl ether

[0033] 15 parts of citric acid.

[0034] In the preparation method of the chlor-alkali wastewater treatment agent, citric acid is added with water to prepare a citric acid aqueous solution with a concentration of 2 mol / l. Put the sodium silicate and citric acid aqueous solution into the reaction kettle and heat and stir for 1 hour at a heating temperature of 50°C; add triethoxy silylpropyl glycerol ether into the reaction kettle and heat and stir for 5 hours under a nitrogen atmosphere at a heating temperature of 70 ℃. Then the temperature is lowered to 30°C, limestone is added, and stirred for 5 hours to obtain the chlor-alkali wastewater treatment agent.

Embodiment 2

[0036] In the embodiment of the present invention, the chlor-alkali wastewater treatment agent is composed of the following raw materials in parts by weight:

[0037] 50 parts of sodium silicate

[0038] 70 parts limestone

[0039] 40 parts of triethoxysilyl propyl glyceryl ether

[0040] 40 parts of citric acid.

[0041] In the preparation method of the chlor-alkali wastewater treatment agent, citric acid is added with water to prepare an aqueous solution of citric acid with a concentration of 5 mol / l. Put the sodium silicate and citric acid aqueous solution into the reaction kettle and heat and stir for 15 hours at a heating temperature of 100°C; add triethoxysilyl glycerol ether into the reaction kettle and heat and stir for 15 hours under a nitrogen atmosphere at a heating temperature of 80 ℃. Then the temperature is lowered to 40°C, limestone is added, and the mixture is stirred for 12 hours to obtain the chlor-alkali wastewater treatment agent.

Embodiment 3

[0043] In the embodiment of the present invention, the chlor-alkali wastewater treatment agent is composed of the following raw materials in parts by weight:

[0044] 35 parts of sodium silicate

[0045] 62 parts limestone

[0046] 25 parts of triethoxy silyl propyl glyceryl ether

[0047] 25 parts of citric acid.

[0048] In the preparation method of the chlor-alkali wastewater treatment agent, citric acid is added with water to prepare an aqueous solution of citric acid with a concentration of 3 mol / l. Put the sodium silicate and citric acid aqueous solution into the reaction kettle and heat and stir for 5 hours at a heating temperature of 60°C; add triethoxysilyl glycerol ether into the reaction kettle and heat and stir for 8 hours under a nitrogen atmosphere at a heating temperature of 72 ℃. Then the temperature is lowered to 32°C, limestone is added, and stirred for 7 hours to obtain the chlor-alkali wastewater treatment agent.

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PUM

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Abstract

The invention discloses a chlor-alkali wastewater treating agent and a preparation method thereof. The chlor-alkali wastewater treating agent comprises raw materials in parts by weight as follows: 30-50 parts of sodium silicate, 60-70 parts of limestone, 20-40 parts of triethoxysilyl propyl glyceryl ether and 15-40 parts of citric acid. During preparation, water is added to the citric acid, a citric acid aqueous solution with the concentration of 2-5 mol / l is prepared, sodium silicate and the citric acid aqueous solution are fed into a reaction kettle to be heated and stirred for 1-15 h, and the heating temperature is 50-100 DEG C; triethoxysilyl propyl glyceryl ether is added to the reaction kettle and is heated and stirred for 5-15 h under nitrogen atmosphere, and the heating temperature is 70-80 DEG C; the temperature is reduced to 30-40 DEG C, the limestone is added, the mixture is stirred for 5-12 h, and the treating agent is obtained. The chlor-alkali wastewater treating agent has the advantages of easy availability of raw materials, low cost, simple process, simplicity and convenience in operation and good treating effect, and is used for treating industrial wastewater such as chlor-alkali containing daily industrial wastewater, food production wastewater and the like.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to a chlor-alkali wastewater treatment agent and a preparation method thereof. Background technique [0002] The chlor-alkali industry is one of the most basic chemical industries, including polyvinyl chloride resin, caustic soda, and hydrochloric acid. Chlor-alkali products such as liquid chlorine are indispensable substances for the national economy and people's lives, and occupy an important position in the national economy and national defense construction. At the same time, the chlor-alkali industry also has relatively large environmental pollution. As people's awareness of environmental protection increases, more and more attention is paid to the pollution caused by the chemical production process based on the chlor-alkali industry and the impact of its products on the environment. Therefore, while giving full play to the role of the chlor-alkali industry and chemical production ba...

Claims

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Application Information

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IPC IPC(8): C02F1/00
Inventor 俞亮亮
Owner 宁波保税区维迪克环保科技有限公司
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